History of Gomoku: 4,000 Years of Five in a Row

Ancient Origins: Who Invented Gomoku?

Nobody invented gomoku. It just kind of happened. People were already playing Go on those classic wooden boards with the grid lines and the black-and-white stones, and at some point someone said "hey, what if we just race to get five in a row instead?" The game the Chinese called Wuzi Qi (五子棋, "Five-Stone Chess") was the result. Exactly when this started is anyone's guess — some people trace it back to the Shang Dynasty (1600–1046 BCE), but honestly, the evidence for that is thin. What we do know is that the game is older than writing in China, and it was played on Go boards centuries before anyone bothered giving it its own name.

Here's why the Go connection matters: Go and gomoku use the exact same gear. Same board, same stones. For thousands of years, gomoku was basically the side hustle of the Go world — you'd play a serious Go match, then screw around with gomoku while taking a break. It was the faster, simpler cousin. Think of it like how people play Texas Hold'em at a poker night and then switch to a quick round of Blackjack between hands. That's why gomoku uses a 15×15 grid (smaller than Go's 19×19) and why Black goes first — both borrowed straight from Go.

Spreading Across East Asia (600–1600 CE)

As trade and cultural exchange picked up along the old routes, Wuzi Qi hopped from China to its neighbors. Every country that picked it up gave it their own name and their own spin:

In Japan, the game went by Kakugo (格五) during the Heian period (794–1185) and pops up in literature from that era. The Japanese were the first to really take the game seriously — they started working out opening patterns and figuring out strategy in a way that nobody else bothered with at the time.

Korea calls it Omok (오목, literally "five pebbles") and plays it a bit differently — not the rules, those are the same, but the vibe. In Korea, Omok is everywhere: schools, offices, online cafes. It's a social thing, like playing pool at a bar in the US. Korea has also put out some seriously strong Renju players, and Korean gomoku platforms (Omok Room has been big since the early 2000s) kept the online scene alive when most of the world didn't even know the game existed.

China kept Wuzi Qi casual for centuries. Kids played it at home, families played it after dinner, Go players used it as a warmup. Go got all the serious attention — books, theory, professional schools. Gomoku? It was treated like a kid's game, too simple to bother studying. That perception stuck around until Renju players started showing results that made people think twice.

The Renju Revolution (1899)

By the late 1800s, Japanese gomoku players had figured out something annoying: Black (the first player) won way too much. This wasn't a hunch — strong players could basically guarantee a win as Black by following a handful of attack patterns. At the highest level, the game was broken. Everyone knew it.

Enter Ruikou Kuroiwa, a journalist who in 1899 came up with a new name and a new set of rules. He called it Renju (連珠), which means "connected pearls" — a deliberate rebrand. The old name, gomoku (五目並べ), just means "five pieces in a row," which is about as exciting as calling chess "move-the-horse game." Renju sounded elegant. It said: this isn't just a kids' game anymore.

The new rules hit Black with three restrictions:

• Double-three — no making two open threes at the same time
• Double-four — no making two lines of four at the same time
• Overline — no making six or more in a row (only exactly five wins)

These rules didn't just tweak the game — they saved it. Without them, Black always wins with perfect play. With them, skill actually matters. White has a fighting chance, and the game is worth playing competitively. See the full Renju rules →

The Proof That Changed Everything (1993)

In 1993, a Dutch computer scientist named Victor Allis proved what competitive players had been grumbling about for decades: in free-style gomoku (no forbidden moves), Black always wins. Period. Full stop. Allis used threat-space search and a massive game database to show that no matter what White does, Black can counter it and eventually force the win. Read the full breakdown of what "solved" actually means →

Now here's the twist: Allis proved the existence of a winning strategy, but actually using it is something else entirely. The strategy tree is so huge that no human brain can hold it. Between two real people, gomoku is still a real game — Black wins about 55-60% of the time at top-level play, not 100%. That gap between "mathematically solved" and "actually solved when a human sits down to play" is where the game still lives and breathes.

The proof basically validated everything Renju had been doing for the past century. If free-style gomoku is a guaranteed Black win, then free-style gomoku will never be a fair competitive game, full stop. Those forbidden-move rules from 1899? They weren't arbitrary — they were a necessary fix, and now there was math to prove it. After Allis's proof, Renju stopped being "the gomoku variant with the weird rules" and became "the only way to play gomoku competitively and have it be fair."

The Modern Era: World Championships & Online Play (1988–Present)

The Renju International Federation (RIF) kicked things off in 1988, setting up unified rules and organizing the first-ever World Renju Championship in 1989. It's been running every couple years since then.

Quick hit timeline of the modern era:

• 1988 — RIF founded in Stockholm
• 1989 — First World Renju Championship
• 1993 — Allis proves free-style gomoku is a first-player win
• 1996 — RIF codifies 26 professional openings
• 2000s — Online gomoku platforms go mainstream — anyone with a browser can play
• 2010s — AI gomoku engines become unbeatable

Here's a fun fact: Estonia — a country of 1.3 million people — has been a gomoku powerhouse. Players like Ants Soosõrv (multiple world titles) and Ando Meriste put Estonia on the map. On the Asian side, Japan and China dominate, while Russia and Sweden round out the European scene. Mongolia has also produced strong players. For a game most Westerners have never heard of, the competitive landscape is surprisingly global. If you are curious about playing rather than just reading the history, our gomoku tournament guide explains how pairings, clocks, scoresheets, and entry actually work.